Shock absorber for use on automobiles



R. ROBISON ET AL SHOCK ABSORBER FOR USE ON AUTOMOBILES Jan, 13, 1925.

l yFiled Nov.

J aia. l

INVENTOPS RR0b1l-son und I'. CMQI'ICQL BY ATTORNEY Patented dan,4 13, 19.25.

N UNITED v'Sfr'rES i IMEFVFY GPH-CE.'- i

. fausser. noison lAnn rnnnnnrcxc. 4Manara, or raoxsonoflnrronnm ASHOCK. Ansonianln FoaUsn oN aU'roMoBILEs.

` f y implication inea ngi/meer 2e, 1923. serial No. 676.942.

To allqwlzlom mayconcem l Be it known that we, RUSSEL RomsoN and FREDERICK C. MEnKnL, citizens of the `,United States", -residing"` `'at Jackson, countyfof Amador, State of California, have invented certain Vnew y and useful! Ilnprove'mentsv in Shock Absorbers for Use on Automobilesy and we dodeclare the following to be a full,

clear, and exact ,description of the "same,

reference being had to the accompanying 1 drawings, and tothe characters of reference marked thereon, whichform a partofthis application. I p

This invention relates to `improvements in `shock-absorbing` devices for `motor yve- ``hicles,", and principally representsfan imp rovement over thattype of shock absorber` shownfin our"copending application, Serial No`.,66Q,316, filed August 31st, 1923.

The principal objectof the presentifnvention is to provide a shock-absorber operating .on thelsame principle as the previous one,

and with the same advantagesdbut having additional Aadvantages in that it may applied to the` springs and frame of a car re-f y gardless of the spacing of the` springs `from l`the frame, and the lfhud-containingbodyof p "whichma'ytbe' made to be set in any'position desired or necessary without interfering with the efficiency of the shock absorberl A Yfurther objectofj the inventionis to partsas will"`fully appearV by a perusall of p p the lfollowing,specification and claims.

`jIn the drawings vsimilar characters of reference lndicate correspondlng' parteI in the several `views Fig.`1 isa side elevation of tha-shock absorber asfapplied to `a car,`the f1uid`con` lbody being `set in a` horizontal taining position. y, Y

Fig. 2 isa longitudinal section ofthe device, the .parts beingr Vin. their normal positions. A V 1 Fig. 3 is a cross sectionon the line 3-3 `Referring now more particularly to the characters of reference on the drawings, the numeral 1` denotes 'a -substantially tubular casing, closed at both ends, and preferably made of two vertically split halves, for ease of manufacture and assembly'.

`12V of thelp'iston's.

Mountedin the casing lengthwise thereof,

yand held against Vrotative movement r.therein fby the clampingtogether ofthe two parts of the casing, is `a cylinder 2` provided `with thereof.

A shaft 5 is journaled in `bearings1i.6

formed inthe walls of this extension ad-v jacentits end farthest from theaXialline thereof; this shaft extending at right angles to said axial line andto the radial plane of the extension.

An arm 7 is fixed onthe shaft the inder Vslot and into a" similarly disposed slot 8 which projects .through Ua pistonV for plunger 9`intermediate the ends thereof, the

Ipart 4, said' arm projecting through the cylpiston being slidably mounted in the cylinder and beyond the slot 8 havinga fluidcylinder, as by means of rines 10. Y

p r.ldhe arm 7 is connected to the piston by a link 11, so that the latter willbe yreciprocated in"y the cylinder with the-rotation of shaft 5; l

The cylinder, beyond the pston,.may`have communication with the intermediate slot-of the latter by reason of passages'lQ in the piston, in which passages ball or similar automatically seatingvalves `13 are mount ed';"these valves openin towards their `adjacent'ends of the cylin er. l

Saidends of the cylinder alsolcommnni-IV cate with each other at alltimesindependent i ofthe `piston passagesby means of longitudinallyspaced orifices 14 inthe cylinder wall for certain distances from-f each Aend; theselorices communicating with along-itudinal passage 15 `formed in the casing, and

which also communicatesrwith the passage The shaft projectsoutwardly of one of 'its bearings `6 through a stuffing boX proa lvided, with the latter, and has fixed on said projecting 'end a lever" 16 which `extends downwardly at a suitable acuteaangle .toa horizontal line, and has flexibly connected to its "lower end a. link 17, the opposite and lower end of which is similarly connected to a bracket or saddle 18 adapted to be clamped onto jan axle 19 of a vehicle or onto the spring 20 adjacent said axle, as the case may be.

15, the adjacentvalve 13 being held Yclosed byv the pressure of the oil. At the same time, the y The casingy itself isadapted to be rigidly mounted on .the frame 21 of the car` above said axle or spring by means of bolt-receiving lugs 22 Vformed ,with the casing 1 ontlie face thereof'oppositeto the lever 16 and normal position however, the piston immediparallel to the plane of the latter.

When installing the device Von a vehicle,`-`

the lever 16 is at first left loose on the shaft (if its ultimate position is not known beforehand) 1`-while.the casing 1 `and bracket 18" are `secured in their respective positions.

The shaft 5 1s then turned to a predeterf. `mined "position, which l 1s -that causing -llzlie pistonto be disposed somewhat closer to the-rear,y end of the.. cylinder thainto the otherand the lever lfis then tightened onto` the shaft.' The device isthen readyforoperation, the'casing being first filled withl a fluid, preferably oil. Zhen theframe 2l is raised,- and the piston 9movedt01ward the right hand or forward end of thecyhnder.

` The holes 14 inthat end. of the. cylinder.l

areiso locatedy that wit'hfany normal deflec-` 'of saidfholes, thecombined area of which' is thus available for the escape of the oil from the iinteriorof the cylinder to the passage `opposite `end valve 13 opens, allowing the oil to freely enterthe corresponding end of the .cylinder without depending on the flow through the :adjacent holes 14. Thus the piston may move through a normal stroke,

without appreciable resistance.

Whenythe pistonhowever is drivenbeyond itswnormal` limit oftravel With an excessive l spring deflectionl such as VWouldbehad whentk large bump or chuck holes are encountered by the ,wheels of thevcar, said piston passes" one byone over the adjacent holes 14,

gradually building upa pressure against the vpiston watl lthat end,` due to rthe fact that thearea remaining for-the escapeof the oil `fromt'in `front of the piston is being decreased, the-said area .decreasing 1n proportionto'the Vmovement of the piston' beyond saidA normal limityof :travel thereofa The. result-is ythat a' gradually inereasingfres-ist- Uance to the spring defiecting movement is had; sufficient ,tofresiliently stop said `movementbefore the spring is compressed-excessivelyandfto a possible breaking point. 1

fand spring i relativelyjtoward-each other, the lever 16l a resistancesullcient to i `or quick-rebound lof the spring',duegtojfthe holes' l14 inthe rearv end :of theV "cylinder tliough"\vliich the uid must then'pass. With ariyfrebound of theispring beyondi'its ately startsto' cover up said holes 14, with the result that an additional and constantly increasing resistance to the movement 'of the piston and consequently .toit-he rebound .of-V.

.the spring., is provided,V thus'preventing" ein cessive rebound movement.v

It A1s to. .b understood thati'vliile we p shown-and described a certain definite arrangement of parts, the `specific ,construction 'should it belfounddesirable.

mounted inthecylin'der'heads instead of in# i members.; p Bymerely altering the posi *theiPiStlO--` AISO the cylindergand casing i i might be cast as one instead'ofjas 'separatey tion Ofsetijng.

of y the valves, or by providing,"springffor ,i other means tofholdthem closed, )the casing 'may be `mounted i111, 'other than thxhI- izmlr `v 4tal position shown, sincethe lever 16V not breing permanently fixed 0n `the shafttfmay Vzontalslant irrespective of the positionfof the lcasing and without interfering 4'with"the" normal vsetting ofthe piston.

.A 901; From the" foregoingdescription' it.vvill]be readily `seen that we have producedfjsuch" am.

we claim 1' as f new and useful vfand desire secure by Letters Patent is: I i

A shock absorber includin M i Kyo-ajrfixedcasingf i' having any enclosed l.longitudinal passage', l

cylinderfmounted in the casing, saidfcylindel having longitudinalfand restrietedpassagej.

means adjacent itsendsandfa relatively u n-f restricted passage intermediate thefirst pas-` sages, all said cylinder passages` communicati spaced pistonsfreciprocable in the cylinder "l" ing with thev casing passage, v:connectediandand normally disposed betweentherespepctive end passages and the intermediate pas;V

sageof the cylinder,said pistons having passages therethrough, land check valves in said passages opening towardtlie adjacentendsf of the cylinder.

RnssEL RoiiisoN; i FREDERICK c. Mannen In testimony whereof `we aliix our signa` i. tures.. Withthe return of the.`sprin`g from a de- .y

' liected .to normal position lthe piston offers 

